The 36-year-old is charged in the shooting deaths of his 61-year-old mother, his aunt and three additional people. In December, Brownlow was indicted for the murder of convenience store clerk Luis Gerardo Leal-Carillo, the final victim of the massacre. Brownlow was handed four additional capital murder charges in early June.
"Things are moving along smoothly in the case — it's on track," chief prosecutor Marc Moffitt said when Brownlow was charged. "Our team has been very active in working the case."
Brownlow pleaded not-guilty to the four new murder counts Friday. Although he is undergoing mental health treatment in jail, Brownlow's attorneys say he understands the charges facing him.
If convicted, Brownlow faces up to 99 years in prison, or the death penalty if the district attorney chooses to pursue it.